JP2737656B2 - Dry-wet dual-use cooling medium supply device for grinding wheels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dry-wet dual-use cooling medium supply apparatus for a grinding wheel capable of forcibly supplying a cooling gas or liquid (hereinafter referred to as a cooling medium) in a radial direction of the grinding wheel including a grinding point. About.

[0002]

2. Description of the Related Art Grinding methods are classified into a wet grinding method in which a grinding fluid of a cooling medium is used at a grinding point and a dry grinding method in which grinding is performed directly in the atmosphere. Conventionally, since the dry grinding method does not use a cooling medium, the processing surface is directly affected by grinding heat, and is liable to cause grinding burns and grinding cracks. The present inventor has already proposed a dry grinding apparatus that achieves a cooling effect by using an inert gas for a processing atmosphere. It is necessary to supply points effectively.

[0003] The inventor of the present invention takes a picture of visualizing the air flow around a rotating grinding wheel, which is conventionally used,
The photograph is illustrated in FIG. 4, and it was observed that a stagnation portion 12 of the air flow was generated on the side surface 11 of the grindstone 1. In addition, 13 is a mounting flange of the grindstone 1, F is an arrow indicating the flow of air, R is a rotation direction of the grindstone 1, and S is a line indicating the position of smoke on the photograph. Therefore, in the dry grinding, it is necessary to eliminate such a stagnation portion 12 in order to efficiently supply the inert gas to the grinding point.

In wet grinding, there is no satisfactory means for directly and effectively supplying a cooling medium to a grinding point. In addition, there is a problem of contamination of a working environment due to scattering of mist during grinding. .

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object the object of the present invention by referring to FIGS. A blade is provided on the side surface 11 of the grinding wheel 1 and
Was more coolant rectification and pressurizable to roots, <br/> rectification cowling 2 bowl shape is mounted, and the side surface 1 of the whetstone 1
1 has a shield 6 to prevent the cooling medium from scattering and flowing out.
And the entire surface of the periphery of the side surface 11 of the whetstone 1
A rectifying shield 7 made of a sheet for sealing is adhered to the periphery of the grinding wheel 1 including the grinding point G by applying the cooling medium flowing into the inside of the porous body of the grinding wheel 1 from the medium inlet 4 through the medium outlet 5. It is an object of the present invention to provide a dry-wet dual-use cooling medium supply device capable of forcibly releasing and supplying only in the radial direction of the cooling medium.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a front view showing a cross section of a main part of a cooling medium supply device of the present invention, FIG. 2 is a side view showing a partial cross section thereof, and FIG. 3 is a device of the present invention covered in an airtight chamber installed on a grinding machine. FIG. In the drawing, 1 is a grinding wheel, 2 is a cowling for rectification, 3 is a blade, 4 is a medium inlet, 5 is a medium outlet, 6 is a shield, 7 is a rectifying shield, 8 is a grindstone shaft, 9 is an airtight chamber, and G is The grinding point, W, is the workpiece. The grinding wheel 1 is a conventional circular diamond wheel for rotary grinding that is formed into a porous body that allows ventilation or liquid flow and that can be repeatedly dressed. On the side surface 11 of the whetstone 1, a concentric circular ring-shaped recess 10 is formed. In the recess 10, an annular shield 6 made of synthetic rubber is interposed at the periphery to form a light alloy bowl-shaped interior. A rectifying cowling 2 having blades is fitted thereto, and attached to a grindstone shaft 8 that rotates at high speed integrally with the grindstone 1. Note that the rectifying cowling 2 may be made of a synthetic resin, and it is desirable that the rectifying cowling 2 be lightweight, thin and have high tension.

The inside of the rectifying cowling 2 is partitioned by six blades 3 formed in a radially curved shape, and six divergent cooling medium flow passages 3a are formed.
Also, connected to both ends of the flow passage 3a, six medium inlets 4 are opened in the outer end surface 2a of the boss portion, and six medium outlets 5 are provided in the peripheral position of the inner surface 2b bonded to the grindstone 1. is opened, the blades are formed. The cooling medium introduced from the medium inlet 4 is a rectifying cowling 2 which rotates integrally with the grindstone 1.
Is supplied to the flow passage 3a by the centrifugal force, and is pressurized by the blades 3 and supplied from the medium outlet 5 into the porous body of the grinding stone 1. In addition, the shield 6 operates as a leakage prevention of the cooling medium at that time. In addition, a rectifying shield 7 made of a plastic sheet is adhered to the entire side of the peripheral portion of the above-mentioned indentation recess 10 on the side surface 11 of the grindstone 1 for sealing.
The cooling medium supplied into the grindstone 1 is prevented from scattering and flowing to the side edges, and is controlled so that it can flow only from the outer periphery of the grindstone 1 exposed in the flow direction of the arrow in FIG.

As described above, the dry-wet dual-use cooling medium supply device for a grinding wheel according to the present invention is configured by mounting a rectifying cowling 2 having blades and a rectifying shield 7 on a conventional grinding wheel 1. FIG. 3 shows a grinding wheel with a supply device of the present invention mounted on a conventional table reciprocating surface grinding machine M. In the figure, T is a table of the surface grinder M.
W is a workpiece attached to the table T, and reciprocates with the table T in the horizontal direction on the drawing. In addition, the grinding wheel 1 is attached to the horizontal grinding wheel shaft 8 in the front direction by mounting the supply device of the present invention, and grinds the plane of the workpiece W that rotates at high speed and reciprocates. In addition, in the front direction toward the medium inlet 4 of the rectifying cowling 2 of the supply device, an injection pipe (not shown) of an inert gas is used for dry grinding, and a grinding fluid is injected for wet grinding. Tubes (not shown) are provided respectively. It is injected from the injection tube, subjected
Wherein the cooling medium that will be fed is introduced into the flow path 3a of sequentially rectification cowling 2 from medium inlet 4 of the 6 positions of high speed, pressurized by centrifugal force of the blade, is rectified, the 6 points From the medium outlet 5, the grindstone 1 is supplied to the inside of the porous body through which air and liquid can flow. Further, in the grindstone 1, the flowing cooling medium is controlled by the centrifugal force of the grindstone 1 and the rectifying shield on the side edge, and is discharged only in the radial direction of the grindstone 1 including the grinding point G. used. Therefore, the cooling medium supply device of the present invention can be used commonly for both dry and wet grinding.

Further, as illustrated in FIG.
A box-shaped hermetic chamber 9 is mounted on the top, which hermetically covers a reciprocating table T, a workpiece W, and a grinding portion including the grinding wheel 1 equipped with the cooling medium supply device of the present invention. It is desirable. In the case of dry grinding, the airtight chamber 9 can be filled with an inert substance such as nitrogen gas to create a processing atmosphere. In the case of wet grinding, the grinding fluid discharged in the radial direction from the grindstone 1 flows to the periphery. The scattering is prevented by the airtight chamber 9 and the working environment is protected from contamination. In addition, as shown in FIG. 1, when the supply device of the present invention is mounted on only one side surface 11 of the grindstone 1, a rectifying shield 7 is attached to the peripheral edge of the opposite side surface to prevent scattering. There is a need. Further, the cooling effect can be further improved by mounting the supply device of the present invention oppositely on the side surfaces 11 on both sides.

[0010]

Since the present invention has the above-described structure and operation, the following various effects can be expected. 1) Since there is no possibility that a stagnation portion of the cooling medium is generated on the side surface of the grindstone as in the related art, and the cooling medium is forcibly supplied directly in the radial direction of the grindstone including the grinding point, the cooling can be efficiently performed. 2) Clogging of the grinding wheel can be prevented by the discharge pressure of the cooling medium. 3) The power for forcibly supplying the cooling medium can be supplemented by the power of the original grinding machine. 4) It is economical and efficient because it can be used commonly for both dry and wet grinding.

[Brief description of the drawings]

FIG. 1 is a front view of a main part of a cooling medium supply device of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a front view of a main part of the apparatus of the present invention mounted on a grinding machine provided with an airtight chamber.

FIG. 4 is an explanatory view of an air flow around a conventional grinding wheel during rotation.

[Explanation of Codes] Grinding wheel 2. Rectifying cowling 2a. Outer end face of boss 2b. Inside surface 3. Blade 3a. Flow path 4. Medium inlet 5. Media outlet 6. Shield 7. Rectifying shield 8. Wheel axis 9. Airtight room 10. Inro recess 11. Grindstone side 12. Stagnation section 13. Mounting flange G. Grinding point M. Surface grinder T. Table W. Workpiece F. Air flow direction Wheel rotation direction S. Line showing smoke position

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A Sho 56-89457 (JP, U) JP-A 1-153912 (JP, U) JP-A 2-104963 (JP, U) JP-A 3- 1761 (JP, U)

Claims (1)

(57) [Claims] To 1. A side surface of the circular grinding wheels rotating grinding,
A rectifying cowling equipped with blades inside the bowl shape, the entire surface of the peripheral portion of the side surface of the grinding wheel, and adhering a sheet made of rectification shield for sealing, cold supplied from the side of the grinding wheel
Medium is introduced into the flow passage of the rectifying cowling, which rotates at high speed.
And is pressurized and rectified by the centrifugal force of the blades.
Is supplied to the inside of the porous body through which the whetstone can be vented and passed.
The coolant flowing into the grinding wheel the grinding grindstone dry wet amphibious coolant supply apparatus for a grinding wheel, wherein as the configuration in the radial direction is forced supply including grinding point.